JSFiddle - React, Tailwind, and code Playground

HTML

<div id="wrapper">

    <div id="nav">
    
    </div><!--nav-->

</div><!--wrapper-->

CSS

#wrapper {width:auto; height:auto;}

#nav     {position:absolute; height:75px; background:green; top:25px; left:50px; right:50px;}

JavaScript

//cant set the #nav left and right measure..